Question

Prove the following
cos²∅ (1 + tan²∅) = 1​

Answer 1

Answer:

You can solve this way .

Answer 2

Step-by-step explanation:

${cos }^{2} \alpha (1 + \tan^{2} \alpha ) = 1 (1 + \tan^{2} \alpha = \sec^{2} \alpha \\ \cos^{2} \alpha \times \sec ^{2} \alpha = 1$

hence proved ,i hope will Understand.