Question

pls help me
pls solve it
it is urgent​

Answer 1

Step-by-step explanation:

sinA, cosA, tanA

we know that: sinA/cosA= tanA

cosA= 1/secA

so, cosA=tanA/sinA

1/secA= tanA/sinA

so, secA=sinA/cosA×sinA

secA=1/cosA

so, secA=secA

hence proved....