help

[olive lava]

Need help with 7, not good with trigonometric identities but I do know dy/dx = (1-sec^2(x+y))/(sec^2(x+y)) (correct me if I’m wrong)

[proper lava]

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[weak coyote]

@olive lava yeah and sec square x minus tan square x is one right

[olive lava]

damn

[weak coyote]

@olive lava dude

You have the answer

Just split the numerator

[scarlet summit]

Option E

[scarlet summit]

You were doing good but you need to use some trigonometric formulas to simplify and get your answer