Please solve this question. The best answer will be marked as brainliest.
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[cos@(1+sin@)+cos@(1-sin@)]/1-sin^2x=4
[cos@+cos@sin@+cos@-cos@sin@]/cos^x=4
2cos@/cos^2@=4
2/cos@=4
cos@=1/2
@=60degree
[cos@+cos@sin@+cos@-cos@sin@]/cos^x=4
2cos@/cos^2@=4
2/cos@=4
cos@=1/2
@=60degree
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