1/cos1*cos2+1/cos2*cos3+1/cos3*cos4+..............+1/cos88*cos89=?
aishwaryawagh , 12 Years ago
Grade 12
Most Scoring Topics in IIT JEE> 1/cos1*cos2+1/cos2*cos3+1/cos3*cos4+........
1 Answerssunil raikwar
1/sin1[sin(2-1)/cos1*cos2+sin(3-2)/cos2*cos3+..........sin(89-88)/cos88cos89]
=1/sin1[tan2-tan1+tan3-tan2+tan4-tan3+.........tan89-tan88]
=1/sin1[tan89-tan1]
=1/sin1[sin89/cos89 -sin1/cos1]
=1/sin1[sin(89-1)/cos1cos89]
=1/sin1[sin88/cos1cos89]
=2sin88/2sin1cos1.sin1
=2sin88/sin2.sin1
=2sin88/cos88.sin1
=2tan88.cosec1
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Other Related Questions on most scoring topics in iit jee
scoring chapters from inter 1st year in iit to get atleast below 2000 raks
scoring chapters from inter 1st year in iit to get atleast below 2000 raks
most scoring topics in iit jee
2 Answers Available
Last Activity: 4 Years ago
iam a very average student...and i want to crack jee mains 2021...in this last 7days figure me out on which easy topics i should focus for better score
iam a very average student...and i want to crack jee mains 2021...in this last 7days figure me out on which easy topics i should focus for better score
most scoring topics in iit jee
2 Answers Available
Last Activity: 5 Years ago
Two parallel beams of light P and Q are incident normally on a prism and the transmitted rays are brought to focus with the help of a convergent lens as shown. If the intensities of the upper and lower beams immediately after transmission from face AC are 4I abd I, respectively, find the resultant intensity at the focus.
Two parallel beams of light P and Q are incident normally on a prism and the transmitted rays are brought to focus with the help of a convergent lens as shown. If the intensities of the upper and lower beams immediately after transmission from face AC are 4I abd I, respectively, find the resultant intensity at the focus.
most scoring topics in iit jee
1 Answer Available
Last Activity: 5 Years ago
Tell me the most scoring chapters in maths and chemistry..... And some hacks to solve mcq also...
Tell me the most scoring chapters in maths and chemistry..... And some hacks to solve mcq also...
most scoring topics in iit jee
0 Answer Available
Last Activity: 5 Years ago
The system of connected flexible cables shown in the figure is supporting 2 loads of 550N and 600N at points B and D. Determine the tensions in various segments of the cable
The system of connected flexible cables shown in the figure is supporting 2 loads of 550N and 600N at points B and D. Determine the tensions in various segments of the cable
most scoring topics in iit jee
1 Answer Available
Last Activity: 5 Years ago