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CBSE Class 10 Answered

Cos2a=Sin(3a-35) 
Asked by rach4315 | 28 Jun, 2020, 11:28: AM
answered-by-expert Expert Answer
As we know that sin(90 - x) = cos x
We have
cos 2a = sin(3a - 35)
sin(90 - 2a) = sin(3a - 25)
90 - 2a = 3a - 35
90 + 35 = 3a + 2a
125 = 5a
a = 25
Answered by Renu Varma | 28 Jun, 2020, 04:32: PM

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