Grade 11Trigonometry
IN A TRIANGLE ABC bcsin^2A/cosA+cosBcosC is equal to (A) b^2+c^2(B)bc(C)a^2(D)a^2+bc
IN A TRIANGLE ABC bcsin^2A/cosA+cosBcosC is equal to
(A) b^2+c^2
(B)bc
(C)a^2
(D)a^2+bc
1 Answer
Yash Baheti
Hi
Please follow the steps give to reach the answer :
The correct option is C
Expand the COS a of denominator by writing it as COS [pi- (B+c)].
COS B COS C will cancel out and SIN B SIN C will be remaining.
Now apply the SINE Rule. You will get the answer.
Please follow the steps give to reach the answer :
The correct option is C
Expand the COS a of denominator by writing it as COS [pi- (B+c)].
COS B COS C will cancel out and SIN B SIN C will be remaining.
Now apply the SINE Rule. You will get the answer.
Other Related Questions on trigonometry
In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.
In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.
trigonometry
Last Activity: 3 Years ago
- Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720
- Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720
trigonometry
Last Activity: 4 Years ago
Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)
Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)
trigonometry
Last Activity: 4 Years ago
WHAT IS THE LIMIT WHEN X TOWARDS TO 0 OF sin6x/5x ? lim𝑥→0 𝑠𝑖𝑛6𝑥/5𝑥
WHAT IS THE LIMIT WHEN X TOWARDS TO 0 OF sin6x/5x ? lim𝑥→0 𝑠𝑖𝑛6𝑥/5𝑥
trigonometry
Last Activity: 4 Years ago