What will be the answer of these q with solution???
Kunal , 8 Years ago
Grade 11
Trigonometry> What will be the answer of these q with s...
2 AnswersAamina
Last Activity: 8 Years ago
For question no 26 ,
2250 = 1000 +1250
Applying tan on both sides ,
tan 225 = tan(100+125)
tan(100+125) = 1 [as tan 225 =1 ]
tan 100 + tan 125 =1
1- tan 100. tan 125
tan 100 + tan 225 = 1 – tan100. tan125
tan 100 + tan 125 + tan 100. tan 125 = 1
hence option D is correct.
Aamina
Last Activity: 8 Years ago
For question no 25,
cosA = m.cosB
cosA = m
cosB
Applying componendo and dividendo,
cosA + cosB = m + 1
cosA – cosB m - 1
2 cos [A+B] . cos [B-A]
2 2 = m+1
2 sin [A+B] . sin [B-A] m- 1
2 2
cot [A+B] . cot [B-A] = m+1
2 2 m-1
cot [A+B] = m +1 . tan [B-A]
2 m - 1 2
option [A] is the answer.
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